The World’s Toughest Outboard Marathon | Celebrating 72 Years

Outboard Marathon Nationals: Racing August 8-9, 2020

Inland Waterway, Northern Michigan

Join the Top O’ Michigan Outboard Racing Club (TOMORC) this August for the 72nd Annual Marathon. Over two days of exciting and tough outboard racing in Northern Michigan. The course navigates through 87 miles of Northern Michigan’s beautiful Inland Waterway. Registration will be Friday, August 7th, from 5 to 8 PM at Howe Marine in Indian River. Register also on Saturday, from 8-9 AM at the race pits.





Past Marathon Results


2020 Course

Saturdays course: approx 42 miles, modified Lemans start from pits out 1/4 mile to turn bouy and then back into Indian River. Race runs through Indian River then along the West side of Mullett Lake and entering Cheboygan River and running its full length to a turn around bouy in Cheboygan. The course then follows the same route back to the finish line at Howe Marine on Indian River. Sundays course: approx 42 miles, modified Lemans start from pits across Burt Lake and then North to entrance of Crooked River. Course runs through Crooked River and into and around Crooked Lake making 3 check points and then back into Crooked River. Course then continues South along the West side of Burt Lake then across the lake into the Indian River. The race travels the full length of Indian River to a check point at Mullett Lake and then back through Indian River to the finish line at Howe Marine. The Top O’ Michigan Outboard Racing Club welcomes new participants and race veterans alike.

Aerial photo provided by McVideo Productions

Club History

The TOMORC started in 1949 as the Top O’ Michigan Marathon Association. The tomorc has continued to support the region & promote the marathon for the past 72 years. The club has 25+ active members who have continued to put on the oldest & most prestigious race in the outboard marathon circuit. The Top O’ Michigan Outboard Marathon has been the Marathon Nationals for many years. In 2013, the Top O’ Michigan Marathon won the American Power Boat Association Kevin Ladd Award for Best Stock Outboard Race in Region 6.

Fireside Race

Presented by the Presque Isle Yacht Club in association with TOMORC.
Stock Outboard racing on Grand Lake. Stock Outboard

Short Course | J Classes
20 Minute Marathon Both Days

June 13-14, 2020

TOMORC has been diligently keeping up with the COVID-19 developments throughout the last couple months. This situation is incredibly unique and changes daily. TOMORC is first and foremost committed to following all of the safety requirements imposed by public health authorities. Additionally, government protocols and executive orders have greatly impacted our initial decision-making.

Fireside Info:

Past Marathon Champs

Contact Us

General Info:

Commodore: Dave Umbarger
Vice Commodore: Samantha Fairbairn
Treasurer: Sarah Bek
Secretary: Kimberly Rouleau
Associate Member: Peter Lauer

PO Box 873
Harbor Springs, Michigan 49740

Want to become a member?
Please contact the Board for more information.

tomorc race
Photo provided by Patrick D. McGinnis